The secret behind MSG's surprise 3D broadcast of last night's Rangers/Islanders hockey game? It came together in a two week turnaround which repurposed equipment laying around between stops at a recent Black Eyed Peas concert and next month's NAB show in Las Vegas. Judging by the reviews it was worth the effort with more than a few indicating an interest in buying 3DTVs to check things out at home next time -- while it aired on Cablevision, all the reports we found were based on the screens located at the arena itself. Not everyone agreed on the best aspects of the new production: Christopher Botta of Fanhouse preferred a lack of "reaching through the screen" gimmicks while the New